DOI: 10.1016/j.watres.2018.10.071
Scopus记录号: 2-s2.0-85055963322
论文题名: Cotransport of nanoplastics (NPs) with fullerene (C 60 ) in saturated sand: Effect of NPs/C 60 ratio and seawater salinity
作者: Dong Z. ; Zhang W. ; Qiu Y. ; Yang Z. ; Wang J. ; Zhang Y.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 469
结束页码: 478
语种: 英语
英文关键词: Aggregation
; Fullerene
; Marine environment
; Microplastics
; Nanoplastics
; Transport
Scopus关键词: Agglomeration
; Colloids
; Fullerenes
; Marine engineering
; Seawater effects
; Colloidal dispersion
; Engineered nanoparticles
; High-energy barriers
; Hydrochemical characteristics
; Marine environment
; Microplastics
; Nanoplastics
; Transport
; Suspensions (fluids)
; fullerene
; nanomaterial
; nanoplastic
; plastic
; sea water
; unclassified drug
; aggregation
; dispersion
; fullerene
; hydrogeochemistry
; marine environment
; nanoparticle
; plastic
; ripening
; salinity
; seawater
; Article
; concentration ratio
; dispersion
; ionic strength
; molecular stability
; particle size
; priority journal
; salinity
; sand
; static electricity
; surface charge
; zeta potential
英文摘要: Nanoplastics (NPs) have been identified as newly emerging particulate contaminants. In marine environments, the interaction between NPs and other engineered nanoparticles remains unknown. This study investigated the cotransport of NPs with fullerene (C 60 ) in seawater-saturated columns packed with natural sand as affected by the mass concentration ratio of NPs/C 60 and the hydrochemical characteristics. In seawater with 35 practical salinity units (PSU), NPs could remarkably enhance C 60 dispersion with a NPs/C 60 ratio of 1. NPs behaved as a vehicle to facilitate C 60 transport by decreasing colloidal ζ-potential and forming stable primary heteroaggregates. As the NPs/C 60 ratio decreased to 1/3, NPs mobility was progressively restrained because of the formation of large secondary aggregates. When the ratio continuously decreased to 1/10, the stability and transport of colloids were governed by C 60 rather than NPs. Under this condition, the transport trend of binary suspensions was similar to that of single C 60 suspension, which was characterized by a ripening phenomenon. Seawater salinity is another key factor affecting the stability and associated transport of NPs and C 60 . In seawater with 3.5 PSU, NPs and C 60 (1:1) in binary suspension exhibited colloidal dispersion, which was driven by a high-energy barrier. Thus, the profiles of the cotransport and retention of NPs/C 60 resembled those of single NPs suspension. This work demonstrated that the cotransport of NPs/C 60 strongly depended on their mass concentration ratios and seawater salinity. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122191
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, International Joint Research Center for Sustainable Urban Water System, Shanghai, 200092, China; School of Materials Science and Engineering, Jiading Campus, Tongji University, Shanghai, 201804, China; School of the Environment, Zhejiang University of Technology, Hangzhou, 310014, China
Recommended Citation:
Dong Z.,Zhang W.,Qiu Y.,et al. Cotransport of nanoplastics (NPs) with fullerene (C 60 ) in saturated sand: Effect of NPs/C 60 ratio and seawater salinity[J]. Water Research,2019-01-01